198713597 has 4 divisors (see below), whose sum is σ = 205565820. Its totient is φ = 191861376.

The previous prime is 198713591. The next prime is 198713623. The reversal of 198713597 is 795317891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 795317891 = 389 ⋅2044519.

It can be written as a sum of positive squares in 2 ways, for example, as 147719716 + 50993881 = 12154^2 + 7141^2 .

It is a cyclic number.

It is not a de Polignac number, because 198713597 - 2¹² = 198709501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198713591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3426068 + ... + 3426125.

It is an arithmetic number, because the mean of its divisors is an integer number (51391455).

Almost surely, 2^198713597 is an apocalyptic number.

It is an amenable number.

198713597 is a deficient number, since it is larger than the sum of its proper divisors (6852223).

198713597 is an equidigital number, since it uses as much as digits as its factorization.

198713597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6852222.

The product of its digits is 476280, while the sum is 50.

The square root of 198713597 is about 14096.5810393868. The cubic root of 198713597 is about 583.5470280651.

The spelling of 198713597 in words is "one hundred ninety-eight million, seven hundred thirteen thousand, five hundred ninety-seven".